Question

Joseph had 380 heart beats in 4 minutes how many heart beats does he have in 15 minutes

Answer 1

380 / 4 = 95

95 x 15 = 1425 heartbeats in 15 minutes

Answer 2

380/4 = 95
that 95 beats per minute
95 * 15 = 1425
in 15 minutes his heart beat 1425 times