1. Get a good scale that does body composition; you can't manage what you don't measure. I thought I was lower bf% to start, like most people. Stand on it first thing every single damn day after taking a piss.
2. The only exercises you need, in order of effectiveness: 5x5 squats, 3x5 deadlifts (de facto bread and butter),
- hanging leg raises [true hanging, not roman chair] (5 sets to near failure, 1 minute in between; keeping abs engaged through whole range of motion, no swinging, knees to chest starting and progressing to straight leg, side raises, etc),
- ab wheel roller (watch youtube videos on proper form, tuck hips in),
- planks
3. Eat less; your weight should be lower almost every single day, by any fraction of a pound
Drop the crunches (useless, arguably deleterious), biking (waste of time), pack on the planks and leg lifts